U5533129@ucsvc.ucs.unimelb.edu.au (CARDIOLOGY, R.M.H.) (05/28/90)
I've just upgraded one of our old XTs to an AT by replacing the motherboard. Everything seems to work fine except for the floppy disk. The bios recognises it as a 5 1/4" 360k drive (which is correct), and I can boot off it OK. However, if I boot from the hard drive, and type DIR A: with a disk in the drive, the machine hangs (requiring a warm boot). If I do the directory with no disk in, I get the standard Abort?, Retry? ... message. If I then put the disk in the drive and request a retry, I get the directory and everything works fine from thereon. Anyone come across something like this before? Also, when I try and fix it using the drivparm command, dos gives a Bad command message when processing processing config.sys. I am using DOS 3.3. Any ideas anyone? Thanks in advance. Peter S.